Commit | Line | Data |
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24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 TM |
37 | #include <linux/in6.h> |
38 | #include <net/ipv6.h> | |
24c8dbbb DH |
39 | #include <linux/nfs_xdr.h> |
40 | ||
41 | #include <asm/system.h> | |
42 | ||
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
48 | ||
49 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
50 | ||
51 | static DEFINE_SPINLOCK(nfs_client_lock); | |
52 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 53 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
54 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
55 | ||
5006a76c DH |
56 | /* |
57 | * RPC cruft for NFS | |
58 | */ | |
59 | static struct rpc_version *nfs_version[5] = { | |
60 | [2] = &nfs_version2, | |
61 | #ifdef CONFIG_NFS_V3 | |
62 | [3] = &nfs_version3, | |
63 | #endif | |
64 | #ifdef CONFIG_NFS_V4 | |
65 | [4] = &nfs_version4, | |
66 | #endif | |
67 | }; | |
68 | ||
69 | struct rpc_program nfs_program = { | |
70 | .name = "nfs", | |
71 | .number = NFS_PROGRAM, | |
72 | .nrvers = ARRAY_SIZE(nfs_version), | |
73 | .version = nfs_version, | |
74 | .stats = &nfs_rpcstat, | |
75 | .pipe_dir_name = "/nfs", | |
76 | }; | |
77 | ||
78 | struct rpc_stat nfs_rpcstat = { | |
79 | .program = &nfs_program | |
80 | }; | |
81 | ||
82 | ||
83 | #ifdef CONFIG_NFS_V3_ACL | |
84 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
85 | static struct rpc_version * nfsacl_version[] = { | |
86 | [3] = &nfsacl_version3, | |
87 | }; | |
88 | ||
89 | struct rpc_program nfsacl_program = { | |
90 | .name = "nfsacl", | |
91 | .number = NFS_ACL_PROGRAM, | |
92 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
93 | .version = nfsacl_version, | |
94 | .stats = &nfsacl_rpcstat, | |
95 | }; | |
96 | #endif /* CONFIG_NFS_V3_ACL */ | |
97 | ||
3a498026 TM |
98 | struct nfs_client_initdata { |
99 | const char *hostname; | |
d7422c47 | 100 | const struct sockaddr *addr; |
6e4cffd7 | 101 | size_t addrlen; |
40c55319 | 102 | const struct nfs_rpc_ops *rpc_ops; |
3a498026 TM |
103 | }; |
104 | ||
24c8dbbb DH |
105 | /* |
106 | * Allocate a shared client record | |
107 | * | |
108 | * Since these are allocated/deallocated very rarely, we don't | |
109 | * bother putting them in a slab cache... | |
110 | */ | |
3a498026 | 111 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
112 | { |
113 | struct nfs_client *clp; | |
24c8dbbb DH |
114 | |
115 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
116 | goto error_0; | |
117 | ||
40c55319 TM |
118 | clp->rpc_ops = cl_init->rpc_ops; |
119 | ||
120 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
121 | if (nfs_callback_up() < 0) |
122 | goto error_2; | |
123 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
124 | } | |
125 | ||
126 | atomic_set(&clp->cl_count, 1); | |
127 | clp->cl_cons_state = NFS_CS_INITING; | |
128 | ||
6e4cffd7 CL |
129 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
130 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 131 | |
3a498026 TM |
132 | if (cl_init->hostname) { |
133 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
134 | if (!clp->cl_hostname) |
135 | goto error_3; | |
136 | } | |
137 | ||
138 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
139 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
140 | ||
141 | #ifdef CONFIG_NFS_V4 | |
142 | init_rwsem(&clp->cl_sem); | |
143 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 144 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 145 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
146 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
147 | clp->cl_boot_time = CURRENT_TIME; | |
148 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
149 | #endif | |
150 | ||
151 | return clp; | |
152 | ||
153 | error_3: | |
9c5bf38d TM |
154 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
155 | nfs_callback_down(); | |
24c8dbbb | 156 | error_2: |
24c8dbbb DH |
157 | kfree(clp); |
158 | error_0: | |
159 | return NULL; | |
160 | } | |
161 | ||
5dd3177a TM |
162 | static void nfs4_shutdown_client(struct nfs_client *clp) |
163 | { | |
164 | #ifdef CONFIG_NFS_V4 | |
165 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
166 | nfs4_kill_renewd(clp); | |
9f958ab8 | 167 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
168 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
169 | nfs_idmap_delete(clp); | |
170 | #endif | |
171 | } | |
172 | ||
24c8dbbb DH |
173 | /* |
174 | * Destroy a shared client record | |
175 | */ | |
176 | static void nfs_free_client(struct nfs_client *clp) | |
177 | { | |
40c55319 | 178 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 179 | |
5dd3177a | 180 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
181 | |
182 | /* -EIO all pending I/O */ | |
183 | if (!IS_ERR(clp->cl_rpcclient)) | |
184 | rpc_shutdown_client(clp->cl_rpcclient); | |
185 | ||
186 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
187 | nfs_callback_down(); | |
188 | ||
24c8dbbb DH |
189 | kfree(clp->cl_hostname); |
190 | kfree(clp); | |
191 | ||
192 | dprintk("<-- nfs_free_client()\n"); | |
193 | } | |
194 | ||
195 | /* | |
196 | * Release a reference to a shared client record | |
197 | */ | |
198 | void nfs_put_client(struct nfs_client *clp) | |
199 | { | |
27ba8512 DH |
200 | if (!clp) |
201 | return; | |
202 | ||
24c8dbbb DH |
203 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
204 | ||
205 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
206 | list_del(&clp->cl_share_link); | |
207 | spin_unlock(&nfs_client_lock); | |
208 | ||
209 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
210 | ||
211 | nfs_free_client(clp); | |
212 | } | |
213 | } | |
214 | ||
3b0d3f93 TM |
215 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, |
216 | const struct sockaddr_in *sa2) | |
217 | { | |
218 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
219 | } | |
220 | ||
221 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1, | |
222 | const struct sockaddr_in6 *sa2) | |
223 | { | |
224 | return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr); | |
225 | } | |
226 | ||
227 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
228 | const struct sockaddr *sa2) | |
229 | { | |
230 | switch (sa1->sa_family) { | |
231 | case AF_INET: | |
232 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
233 | (const struct sockaddr_in *)sa2); | |
234 | case AF_INET6: | |
235 | return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1, | |
236 | (const struct sockaddr_in6 *)sa2); | |
237 | } | |
238 | BUG(); | |
239 | } | |
240 | ||
24c8dbbb | 241 | /* |
c81468a1 TM |
242 | * Find a client by IP address and protocol version |
243 | * - returns NULL if no such client | |
24c8dbbb | 244 | */ |
ff052645 | 245 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
246 | { |
247 | struct nfs_client *clp; | |
248 | ||
c81468a1 | 249 | spin_lock(&nfs_client_lock); |
24c8dbbb | 250 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
251 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
252 | ||
13bbc06a | 253 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 254 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
255 | continue; |
256 | ||
24c8dbbb | 257 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 258 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
259 | continue; |
260 | ||
3b0d3f93 TM |
261 | if (addr->sa_family != clap->sa_family) |
262 | continue; | |
c81468a1 | 263 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 264 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
265 | continue; |
266 | ||
c81468a1 TM |
267 | atomic_inc(&clp->cl_count); |
268 | spin_unlock(&nfs_client_lock); | |
269 | return clp; | |
24c8dbbb | 270 | } |
c81468a1 | 271 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 272 | return NULL; |
24c8dbbb DH |
273 | } |
274 | ||
275 | /* | |
c81468a1 TM |
276 | * Find an nfs_client on the list that matches the initialisation data |
277 | * that is supplied. | |
24c8dbbb | 278 | */ |
c81468a1 | 279 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
280 | { |
281 | struct nfs_client *clp; | |
282 | ||
c81468a1 TM |
283 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
284 | /* Don't match clients that failed to initialise properly */ | |
285 | if (clp->cl_cons_state < 0) | |
286 | continue; | |
287 | ||
288 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 289 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
290 | continue; |
291 | ||
292 | /* Match the full socket address */ | |
293 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
294 | continue; | |
295 | ||
296 | atomic_inc(&clp->cl_count); | |
297 | return clp; | |
13bbc06a | 298 | } |
c81468a1 | 299 | return NULL; |
24c8dbbb DH |
300 | } |
301 | ||
302 | /* | |
303 | * Look up a client by IP address and protocol version | |
304 | * - creates a new record if one doesn't yet exist | |
305 | */ | |
3a498026 | 306 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
307 | { |
308 | struct nfs_client *clp, *new = NULL; | |
309 | int error; | |
310 | ||
d7422c47 CL |
311 | dprintk("--> nfs_get_client(%s,v%u)\n", |
312 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
313 | |
314 | /* see if the client already exists */ | |
315 | do { | |
316 | spin_lock(&nfs_client_lock); | |
317 | ||
c81468a1 | 318 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
319 | if (clp) |
320 | goto found_client; | |
321 | if (new) | |
322 | goto install_client; | |
323 | ||
324 | spin_unlock(&nfs_client_lock); | |
325 | ||
3a498026 | 326 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
327 | } while (new); |
328 | ||
329 | return ERR_PTR(-ENOMEM); | |
330 | ||
331 | /* install a new client and return with it unready */ | |
332 | install_client: | |
333 | clp = new; | |
334 | list_add(&clp->cl_share_link, &nfs_client_list); | |
335 | spin_unlock(&nfs_client_lock); | |
336 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
337 | return clp; | |
338 | ||
339 | /* found an existing client | |
340 | * - make sure it's ready before returning | |
341 | */ | |
342 | found_client: | |
343 | spin_unlock(&nfs_client_lock); | |
344 | ||
345 | if (new) | |
346 | nfs_free_client(new); | |
347 | ||
83250493 | 348 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
349 | clp->cl_cons_state != NFS_CS_INITING); |
350 | if (error < 0) { | |
351 | nfs_put_client(clp); | |
352 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
353 | } |
354 | ||
355 | if (clp->cl_cons_state < NFS_CS_READY) { | |
356 | error = clp->cl_cons_state; | |
357 | nfs_put_client(clp); | |
358 | return ERR_PTR(error); | |
359 | } | |
360 | ||
54ceac45 DH |
361 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
362 | ||
24c8dbbb DH |
363 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
364 | return clp; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Mark a server as ready or failed | |
369 | */ | |
54ceac45 | 370 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
371 | { |
372 | clp->cl_cons_state = state; | |
373 | wake_up_all(&nfs_client_active_wq); | |
374 | } | |
5006a76c DH |
375 | |
376 | /* | |
377 | * Initialise the timeout values for a connection | |
378 | */ | |
379 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
380 | unsigned int timeo, unsigned int retrans) | |
381 | { | |
382 | to->to_initval = timeo * HZ / 10; | |
383 | to->to_retries = retrans; | |
384 | if (!to->to_retries) | |
385 | to->to_retries = 2; | |
386 | ||
387 | switch (proto) { | |
0896a725 | 388 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 389 | case XPRT_TRANSPORT_RDMA: |
5006a76c DH |
390 | if (!to->to_initval) |
391 | to->to_initval = 60 * HZ; | |
392 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
393 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
394 | to->to_increment = to->to_initval; | |
395 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
396 | to->to_exponential = 0; | |
397 | break; | |
0896a725 | 398 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
399 | default: |
400 | if (!to->to_initval) | |
401 | to->to_initval = 11 * HZ / 10; | |
402 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
403 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
404 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
405 | to->to_exponential = 1; | |
406 | break; | |
407 | } | |
408 | } | |
409 | ||
410 | /* | |
411 | * Create an RPC client handle | |
412 | */ | |
54ceac45 DH |
413 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
414 | unsigned int timeo, | |
415 | unsigned int retrans, | |
43d78ef2 CL |
416 | rpc_authflavor_t flavor, |
417 | int flags) | |
5006a76c DH |
418 | { |
419 | struct rpc_timeout timeparms; | |
5006a76c | 420 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
421 | struct rpc_create_args args = { |
422 | .protocol = proto, | |
423 | .address = (struct sockaddr *)&clp->cl_addr, | |
6e4cffd7 | 424 | .addrsize = clp->cl_addrlen, |
41877d20 CL |
425 | .timeout = &timeparms, |
426 | .servername = clp->cl_hostname, | |
427 | .program = &nfs_program, | |
428 | .version = clp->rpc_ops->version, | |
429 | .authflavor = flavor, | |
43d78ef2 | 430 | .flags = flags, |
41877d20 | 431 | }; |
5006a76c DH |
432 | |
433 | if (!IS_ERR(clp->cl_rpcclient)) | |
434 | return 0; | |
435 | ||
436 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
437 | clp->retrans_timeo = timeparms.to_initval; | |
438 | clp->retrans_count = timeparms.to_retries; | |
439 | ||
41877d20 | 440 | clnt = rpc_create(&args); |
5006a76c DH |
441 | if (IS_ERR(clnt)) { |
442 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
443 | __FUNCTION__, PTR_ERR(clnt)); | |
444 | return PTR_ERR(clnt); | |
445 | } | |
446 | ||
5006a76c DH |
447 | clp->cl_rpcclient = clnt; |
448 | return 0; | |
449 | } | |
54ceac45 DH |
450 | |
451 | /* | |
452 | * Version 2 or 3 client destruction | |
453 | */ | |
454 | static void nfs_destroy_server(struct nfs_server *server) | |
455 | { | |
54ceac45 DH |
456 | if (!(server->flags & NFS_MOUNT_NONLM)) |
457 | lockd_down(); /* release rpc.lockd */ | |
458 | } | |
459 | ||
460 | /* | |
461 | * Version 2 or 3 lockd setup | |
462 | */ | |
463 | static int nfs_start_lockd(struct nfs_server *server) | |
464 | { | |
465 | int error = 0; | |
466 | ||
40c55319 | 467 | if (server->nfs_client->rpc_ops->version > 3) |
54ceac45 DH |
468 | goto out; |
469 | if (server->flags & NFS_MOUNT_NONLM) | |
470 | goto out; | |
24e36663 N |
471 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
472 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
473 | if (error < 0) |
474 | server->flags |= NFS_MOUNT_NONLM; | |
475 | else | |
476 | server->destroy = nfs_destroy_server; | |
477 | out: | |
478 | return error; | |
479 | } | |
480 | ||
481 | /* | |
482 | * Initialise an NFSv3 ACL client connection | |
483 | */ | |
484 | #ifdef CONFIG_NFS_V3_ACL | |
485 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
486 | { | |
40c55319 | 487 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
488 | goto out_noacl; |
489 | if (server->flags & NFS_MOUNT_NOACL) | |
490 | goto out_noacl; | |
491 | ||
492 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
493 | if (IS_ERR(server->client_acl)) | |
494 | goto out_noacl; | |
495 | ||
496 | /* No errors! Assume that Sun nfsacls are supported */ | |
497 | server->caps |= NFS_CAP_ACLS; | |
498 | return; | |
499 | ||
500 | out_noacl: | |
501 | server->caps &= ~NFS_CAP_ACLS; | |
502 | } | |
503 | #else | |
504 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
505 | { | |
506 | server->flags &= ~NFS_MOUNT_NOACL; | |
507 | server->caps &= ~NFS_CAP_ACLS; | |
508 | } | |
509 | #endif | |
510 | ||
511 | /* | |
512 | * Create a general RPC client | |
513 | */ | |
514 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
515 | { | |
516 | struct nfs_client *clp = server->nfs_client; | |
517 | ||
518 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
519 | if (IS_ERR(server->client)) { | |
520 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
521 | return PTR_ERR(server->client); | |
522 | } | |
523 | ||
524 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
525 | struct rpc_auth *auth; | |
526 | ||
527 | auth = rpcauth_create(pseudoflavour, server->client); | |
528 | if (IS_ERR(auth)) { | |
529 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
530 | return PTR_ERR(auth); | |
531 | } | |
532 | } | |
533 | server->client->cl_softrtry = 0; | |
534 | if (server->flags & NFS_MOUNT_SOFT) | |
535 | server->client->cl_softrtry = 1; | |
536 | ||
537 | server->client->cl_intr = 0; | |
538 | if (server->flags & NFS4_MOUNT_INTR) | |
539 | server->client->cl_intr = 1; | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Initialise an NFS2 or NFS3 client | |
546 | */ | |
2283f8d6 TT |
547 | static int nfs_init_client(struct nfs_client *clp, |
548 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 549 | { |
54ceac45 DH |
550 | int error; |
551 | ||
552 | if (clp->cl_cons_state == NFS_CS_READY) { | |
553 | /* the client is already initialised */ | |
554 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
555 | return 0; | |
556 | } | |
557 | ||
54ceac45 DH |
558 | /* |
559 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
560 | * - RFC 2623, sec 2.3.2 | |
561 | */ | |
2283f8d6 TT |
562 | error = nfs_create_rpc_client(clp, data->nfs_server.protocol, |
563 | data->timeo, data->retrans, RPC_AUTH_UNIX, 0); | |
54ceac45 DH |
564 | if (error < 0) |
565 | goto error; | |
566 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
567 | return 0; | |
568 | ||
569 | error: | |
570 | nfs_mark_client_ready(clp, error); | |
571 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
572 | return error; | |
573 | } | |
574 | ||
575 | /* | |
576 | * Create a version 2 or 3 client | |
577 | */ | |
2283f8d6 TT |
578 | static int nfs_init_server(struct nfs_server *server, |
579 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 580 | { |
3a498026 TM |
581 | struct nfs_client_initdata cl_init = { |
582 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 583 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 584 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 585 | .rpc_ops = &nfs_v2_clientops, |
3a498026 | 586 | }; |
54ceac45 | 587 | struct nfs_client *clp; |
3a498026 | 588 | int error; |
54ceac45 DH |
589 | |
590 | dprintk("--> nfs_init_server()\n"); | |
591 | ||
592 | #ifdef CONFIG_NFS_V3 | |
593 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 594 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
595 | #endif |
596 | ||
597 | /* Allocate or find a client reference we can use */ | |
3a498026 | 598 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
599 | if (IS_ERR(clp)) { |
600 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
601 | return PTR_ERR(clp); | |
602 | } | |
603 | ||
604 | error = nfs_init_client(clp, data); | |
605 | if (error < 0) | |
606 | goto error; | |
607 | ||
608 | server->nfs_client = clp; | |
609 | ||
610 | /* Initialise the client representation from the mount data */ | |
611 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
612 | ||
613 | if (data->rsize) | |
614 | server->rsize = nfs_block_size(data->rsize, NULL); | |
615 | if (data->wsize) | |
616 | server->wsize = nfs_block_size(data->wsize, NULL); | |
617 | ||
618 | server->acregmin = data->acregmin * HZ; | |
619 | server->acregmax = data->acregmax * HZ; | |
620 | server->acdirmin = data->acdirmin * HZ; | |
621 | server->acdirmax = data->acdirmax * HZ; | |
622 | ||
623 | /* Start lockd here, before we might error out */ | |
624 | error = nfs_start_lockd(server); | |
625 | if (error < 0) | |
626 | goto error; | |
627 | ||
2283f8d6 | 628 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
629 | if (error < 0) |
630 | goto error; | |
631 | ||
632 | server->namelen = data->namlen; | |
633 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
634 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
635 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
636 | return 0; | |
637 | ||
638 | error: | |
639 | server->nfs_client = NULL; | |
640 | nfs_put_client(clp); | |
641 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
642 | return error; | |
643 | } | |
644 | ||
645 | /* | |
646 | * Load up the server record from information gained in an fsinfo record | |
647 | */ | |
648 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
649 | { | |
650 | unsigned long max_rpc_payload; | |
651 | ||
652 | /* Work out a lot of parameters */ | |
653 | if (server->rsize == 0) | |
654 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
655 | if (server->wsize == 0) | |
656 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
657 | ||
658 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
659 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
660 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
661 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
662 | ||
663 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
664 | if (server->rsize > max_rpc_payload) | |
665 | server->rsize = max_rpc_payload; | |
666 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
667 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
668 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 669 | |
54ceac45 DH |
670 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
671 | ||
672 | if (server->wsize > max_rpc_payload) | |
673 | server->wsize = max_rpc_payload; | |
674 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
675 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
676 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
677 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
678 | ||
679 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
680 | if (server->dtsize > PAGE_CACHE_SIZE) | |
681 | server->dtsize = PAGE_CACHE_SIZE; | |
682 | if (server->dtsize > server->rsize) | |
683 | server->dtsize = server->rsize; | |
684 | ||
685 | if (server->flags & NFS_MOUNT_NOAC) { | |
686 | server->acregmin = server->acregmax = 0; | |
687 | server->acdirmin = server->acdirmax = 0; | |
688 | } | |
689 | ||
690 | server->maxfilesize = fsinfo->maxfilesize; | |
691 | ||
692 | /* We're airborne Set socket buffersize */ | |
693 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
694 | } | |
695 | ||
696 | /* | |
697 | * Probe filesystem information, including the FSID on v2/v3 | |
698 | */ | |
699 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
700 | { | |
701 | struct nfs_fsinfo fsinfo; | |
702 | struct nfs_client *clp = server->nfs_client; | |
703 | int error; | |
704 | ||
705 | dprintk("--> nfs_probe_fsinfo()\n"); | |
706 | ||
707 | if (clp->rpc_ops->set_capabilities != NULL) { | |
708 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
709 | if (error < 0) | |
710 | goto out_error; | |
711 | } | |
712 | ||
713 | fsinfo.fattr = fattr; | |
714 | nfs_fattr_init(fattr); | |
715 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
716 | if (error < 0) | |
717 | goto out_error; | |
718 | ||
719 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
720 | error = bdi_init(&server->backing_dev_info); |
721 | if (error) | |
722 | goto out_error; | |
723 | ||
54ceac45 DH |
724 | |
725 | /* Get some general file system info */ | |
726 | if (server->namelen == 0) { | |
727 | struct nfs_pathconf pathinfo; | |
728 | ||
729 | pathinfo.fattr = fattr; | |
730 | nfs_fattr_init(fattr); | |
731 | ||
732 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
733 | server->namelen = pathinfo.max_namelen; | |
734 | } | |
735 | ||
736 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
737 | return 0; | |
738 | ||
739 | out_error: | |
740 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
741 | return error; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Copy useful information when duplicating a server record | |
746 | */ | |
747 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
748 | { | |
749 | target->flags = source->flags; | |
750 | target->acregmin = source->acregmin; | |
751 | target->acregmax = source->acregmax; | |
752 | target->acdirmin = source->acdirmin; | |
753 | target->acdirmax = source->acdirmax; | |
754 | target->caps = source->caps; | |
755 | } | |
756 | ||
757 | /* | |
758 | * Allocate and initialise a server record | |
759 | */ | |
760 | static struct nfs_server *nfs_alloc_server(void) | |
761 | { | |
762 | struct nfs_server *server; | |
763 | ||
764 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
765 | if (!server) | |
766 | return NULL; | |
767 | ||
768 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
769 | ||
770 | /* Zero out the NFS state stuff */ | |
771 | INIT_LIST_HEAD(&server->client_link); | |
772 | INIT_LIST_HEAD(&server->master_link); | |
773 | ||
ef818a28 SD |
774 | init_waitqueue_head(&server->active_wq); |
775 | atomic_set(&server->active, 0); | |
776 | ||
54ceac45 DH |
777 | server->io_stats = nfs_alloc_iostats(); |
778 | if (!server->io_stats) { | |
779 | kfree(server); | |
780 | return NULL; | |
781 | } | |
782 | ||
783 | return server; | |
784 | } | |
785 | ||
786 | /* | |
787 | * Free up a server record | |
788 | */ | |
789 | void nfs_free_server(struct nfs_server *server) | |
790 | { | |
791 | dprintk("--> nfs_free_server()\n"); | |
792 | ||
793 | spin_lock(&nfs_client_lock); | |
794 | list_del(&server->client_link); | |
795 | list_del(&server->master_link); | |
796 | spin_unlock(&nfs_client_lock); | |
797 | ||
798 | if (server->destroy != NULL) | |
799 | server->destroy(server); | |
5cef338b TM |
800 | |
801 | if (!IS_ERR(server->client_acl)) | |
802 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
803 | if (!IS_ERR(server->client)) |
804 | rpc_shutdown_client(server->client); | |
805 | ||
806 | nfs_put_client(server->nfs_client); | |
807 | ||
808 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 809 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
810 | kfree(server); |
811 | nfs_release_automount_timer(); | |
812 | dprintk("<-- nfs_free_server()\n"); | |
813 | } | |
814 | ||
815 | /* | |
816 | * Create a version 2 or 3 volume record | |
817 | * - keyed on server and FSID | |
818 | */ | |
2283f8d6 | 819 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
820 | struct nfs_fh *mntfh) |
821 | { | |
822 | struct nfs_server *server; | |
823 | struct nfs_fattr fattr; | |
824 | int error; | |
825 | ||
826 | server = nfs_alloc_server(); | |
827 | if (!server) | |
828 | return ERR_PTR(-ENOMEM); | |
829 | ||
830 | /* Get a client representation */ | |
831 | error = nfs_init_server(server, data); | |
832 | if (error < 0) | |
833 | goto error; | |
834 | ||
835 | BUG_ON(!server->nfs_client); | |
836 | BUG_ON(!server->nfs_client->rpc_ops); | |
837 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
838 | ||
839 | /* Probe the root fh to retrieve its FSID */ | |
840 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
841 | if (error < 0) | |
842 | goto error; | |
54af3bb5 TM |
843 | if (server->nfs_client->rpc_ops->version == 3) { |
844 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
845 | server->namelen = NFS3_MAXNAMLEN; | |
846 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
847 | server->caps |= NFS_CAP_READDIRPLUS; | |
848 | } else { | |
849 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
850 | server->namelen = NFS2_MAXNAMLEN; | |
851 | } | |
852 | ||
54ceac45 DH |
853 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
854 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
855 | if (error < 0) { | |
856 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
857 | goto error; | |
858 | } | |
859 | } | |
860 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
861 | ||
6daabf1b DH |
862 | dprintk("Server FSID: %llx:%llx\n", |
863 | (unsigned long long) server->fsid.major, | |
864 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
865 | |
866 | BUG_ON(!server->nfs_client); | |
867 | BUG_ON(!server->nfs_client->rpc_ops); | |
868 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
869 | ||
870 | spin_lock(&nfs_client_lock); | |
871 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
872 | list_add_tail(&server->master_link, &nfs_volume_list); | |
873 | spin_unlock(&nfs_client_lock); | |
874 | ||
875 | server->mount_time = jiffies; | |
876 | return server; | |
877 | ||
878 | error: | |
879 | nfs_free_server(server); | |
880 | return ERR_PTR(error); | |
881 | } | |
882 | ||
883 | #ifdef CONFIG_NFS_V4 | |
884 | /* | |
885 | * Initialise an NFS4 client record | |
886 | */ | |
887 | static int nfs4_init_client(struct nfs_client *clp, | |
888 | int proto, int timeo, int retrans, | |
7d9ac06f | 889 | const char *ip_addr, |
54ceac45 DH |
890 | rpc_authflavor_t authflavour) |
891 | { | |
892 | int error; | |
893 | ||
894 | if (clp->cl_cons_state == NFS_CS_READY) { | |
895 | /* the client is initialised already */ | |
896 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
897 | return 0; | |
898 | } | |
899 | ||
900 | /* Check NFS protocol revision and initialize RPC op vector */ | |
901 | clp->rpc_ops = &nfs_v4_clientops; | |
902 | ||
43d78ef2 CL |
903 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
904 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
905 | if (error < 0) |
906 | goto error; | |
7d9ac06f | 907 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
908 | |
909 | error = nfs_idmap_new(clp); | |
910 | if (error < 0) { | |
911 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
912 | __FUNCTION__, error); | |
54ceac45 DH |
913 | goto error; |
914 | } | |
9c5bf38d | 915 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
916 | |
917 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
918 | return 0; | |
919 | ||
920 | error: | |
921 | nfs_mark_client_ready(clp, error); | |
922 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
923 | return error; | |
924 | } | |
925 | ||
926 | /* | |
927 | * Set up an NFS4 client | |
928 | */ | |
929 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
930 | const char *hostname, |
931 | const struct sockaddr *addr, | |
932 | const size_t addrlen, | |
7d9ac06f | 933 | const char *ip_addr, |
54ceac45 DH |
934 | rpc_authflavor_t authflavour, |
935 | int proto, int timeo, int retrans) | |
936 | { | |
3a498026 TM |
937 | struct nfs_client_initdata cl_init = { |
938 | .hostname = hostname, | |
dcecae0f CL |
939 | .addr = addr, |
940 | .addrlen = addrlen, | |
40c55319 | 941 | .rpc_ops = &nfs_v4_clientops, |
3a498026 | 942 | }; |
54ceac45 DH |
943 | struct nfs_client *clp; |
944 | int error; | |
945 | ||
946 | dprintk("--> nfs4_set_client()\n"); | |
947 | ||
948 | /* Allocate or find a client reference we can use */ | |
3a498026 | 949 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
950 | if (IS_ERR(clp)) { |
951 | error = PTR_ERR(clp); | |
952 | goto error; | |
953 | } | |
7d9ac06f | 954 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
955 | if (error < 0) |
956 | goto error_put; | |
957 | ||
958 | server->nfs_client = clp; | |
959 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
960 | return 0; | |
961 | ||
962 | error_put: | |
963 | nfs_put_client(clp); | |
964 | error: | |
965 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
966 | return error; | |
967 | } | |
968 | ||
969 | /* | |
970 | * Create a version 4 volume record | |
971 | */ | |
972 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 973 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
974 | { |
975 | int error; | |
976 | ||
977 | dprintk("--> nfs4_init_server()\n"); | |
978 | ||
979 | /* Initialise the client representation from the mount data */ | |
980 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
981 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
982 | ||
983 | if (data->rsize) | |
984 | server->rsize = nfs_block_size(data->rsize, NULL); | |
985 | if (data->wsize) | |
986 | server->wsize = nfs_block_size(data->wsize, NULL); | |
987 | ||
988 | server->acregmin = data->acregmin * HZ; | |
989 | server->acregmax = data->acregmax * HZ; | |
990 | server->acdirmin = data->acdirmin * HZ; | |
991 | server->acdirmax = data->acdirmax * HZ; | |
992 | ||
91ea40b9 | 993 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
994 | |
995 | /* Done */ | |
996 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
997 | return error; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Create a version 4 volume record | |
1002 | * - keyed on server and FSID | |
1003 | */ | |
91ea40b9 | 1004 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1005 | struct nfs_fh *mntfh) |
1006 | { | |
1007 | struct nfs_fattr fattr; | |
1008 | struct nfs_server *server; | |
1009 | int error; | |
1010 | ||
1011 | dprintk("--> nfs4_create_server()\n"); | |
1012 | ||
1013 | server = nfs_alloc_server(); | |
1014 | if (!server) | |
1015 | return ERR_PTR(-ENOMEM); | |
1016 | ||
1017 | /* Get a client record */ | |
91ea40b9 TT |
1018 | error = nfs4_set_client(server, |
1019 | data->nfs_server.hostname, | |
dcecae0f | 1020 | (struct sockaddr *)&data->nfs_server.address, |
4c568017 | 1021 | data->nfs_server.addrlen, |
91ea40b9 TT |
1022 | data->client_address, |
1023 | data->auth_flavors[0], | |
1024 | data->nfs_server.protocol, | |
1025 | data->timeo, data->retrans); | |
54ceac45 DH |
1026 | if (error < 0) |
1027 | goto error; | |
1028 | ||
1029 | /* set up the general RPC client */ | |
91ea40b9 | 1030 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1031 | if (error < 0) |
1032 | goto error; | |
1033 | ||
1034 | BUG_ON(!server->nfs_client); | |
1035 | BUG_ON(!server->nfs_client->rpc_ops); | |
1036 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1037 | ||
1038 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1039 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1040 | if (error < 0) |
1041 | goto error; | |
1042 | ||
6daabf1b DH |
1043 | dprintk("Server FSID: %llx:%llx\n", |
1044 | (unsigned long long) server->fsid.major, | |
1045 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1046 | dprintk("Mount FH: %d\n", mntfh->size); |
1047 | ||
1048 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1049 | if (error < 0) | |
1050 | goto error; | |
1051 | ||
54af3bb5 TM |
1052 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1053 | server->namelen = NFS4_MAXNAMLEN; | |
1054 | ||
54ceac45 DH |
1055 | BUG_ON(!server->nfs_client); |
1056 | BUG_ON(!server->nfs_client->rpc_ops); | |
1057 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1058 | ||
1059 | spin_lock(&nfs_client_lock); | |
1060 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1061 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1062 | spin_unlock(&nfs_client_lock); | |
1063 | ||
1064 | server->mount_time = jiffies; | |
1065 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1066 | return server; | |
1067 | ||
1068 | error: | |
1069 | nfs_free_server(server); | |
1070 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1071 | return ERR_PTR(error); | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * Create an NFS4 referral server record | |
1076 | */ | |
1077 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1078 | struct nfs_fh *mntfh) |
54ceac45 DH |
1079 | { |
1080 | struct nfs_client *parent_client; | |
1081 | struct nfs_server *server, *parent_server; | |
1082 | struct nfs_fattr fattr; | |
1083 | int error; | |
1084 | ||
1085 | dprintk("--> nfs4_create_referral_server()\n"); | |
1086 | ||
1087 | server = nfs_alloc_server(); | |
1088 | if (!server) | |
1089 | return ERR_PTR(-ENOMEM); | |
1090 | ||
1091 | parent_server = NFS_SB(data->sb); | |
1092 | parent_client = parent_server->nfs_client; | |
1093 | ||
1094 | /* Get a client representation. | |
1095 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1096 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1097 | data->addr, |
1098 | data->addrlen, | |
dcecae0f CL |
1099 | parent_client->cl_ipaddr, |
1100 | data->authflavor, | |
1101 | parent_server->client->cl_xprt->prot, | |
1102 | parent_client->retrans_timeo, | |
1103 | parent_client->retrans_count); | |
297de4f6 | 1104 | if (error < 0) |
1105 | goto error; | |
54ceac45 DH |
1106 | |
1107 | /* Initialise the client representation from the parent server */ | |
1108 | nfs_server_copy_userdata(server, parent_server); | |
1109 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1110 | ||
1111 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1112 | if (error < 0) | |
1113 | goto error; | |
1114 | ||
1115 | BUG_ON(!server->nfs_client); | |
1116 | BUG_ON(!server->nfs_client->rpc_ops); | |
1117 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1118 | ||
f2d0d85e TM |
1119 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1120 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1121 | if (error < 0) | |
1122 | goto error; | |
1123 | ||
54ceac45 | 1124 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1125 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1126 | if (error < 0) |
1127 | goto error; | |
1128 | ||
54af3bb5 TM |
1129 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1130 | server->namelen = NFS4_MAXNAMLEN; | |
1131 | ||
54ceac45 | 1132 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1133 | (unsigned long long) server->fsid.major, |
1134 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1135 | |
1136 | spin_lock(&nfs_client_lock); | |
1137 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1138 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1139 | spin_unlock(&nfs_client_lock); | |
1140 | ||
1141 | server->mount_time = jiffies; | |
1142 | ||
1143 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1144 | return server; | |
1145 | ||
1146 | error: | |
1147 | nfs_free_server(server); | |
1148 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1149 | return ERR_PTR(error); | |
1150 | } | |
1151 | ||
1152 | #endif /* CONFIG_NFS_V4 */ | |
1153 | ||
1154 | /* | |
1155 | * Clone an NFS2, NFS3 or NFS4 server record | |
1156 | */ | |
1157 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1158 | struct nfs_fh *fh, | |
1159 | struct nfs_fattr *fattr) | |
1160 | { | |
1161 | struct nfs_server *server; | |
1162 | struct nfs_fattr fattr_fsinfo; | |
1163 | int error; | |
1164 | ||
1165 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1166 | (unsigned long long) fattr->fsid.major, |
1167 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1168 | |
1169 | server = nfs_alloc_server(); | |
1170 | if (!server) | |
1171 | return ERR_PTR(-ENOMEM); | |
1172 | ||
1173 | /* Copy data from the source */ | |
1174 | server->nfs_client = source->nfs_client; | |
1175 | atomic_inc(&server->nfs_client->cl_count); | |
1176 | nfs_server_copy_userdata(server, source); | |
1177 | ||
1178 | server->fsid = fattr->fsid; | |
1179 | ||
1180 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1181 | if (error < 0) | |
1182 | goto out_free_server; | |
1183 | if (!IS_ERR(source->client_acl)) | |
1184 | nfs_init_server_aclclient(server); | |
1185 | ||
1186 | /* probe the filesystem info for this server filesystem */ | |
1187 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1188 | if (error < 0) | |
1189 | goto out_free_server; | |
1190 | ||
54af3bb5 TM |
1191 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1192 | server->namelen = NFS4_MAXNAMLEN; | |
1193 | ||
54ceac45 | 1194 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1195 | (unsigned long long) server->fsid.major, |
1196 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1197 | |
1198 | error = nfs_start_lockd(server); | |
1199 | if (error < 0) | |
1200 | goto out_free_server; | |
1201 | ||
1202 | spin_lock(&nfs_client_lock); | |
1203 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1204 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1205 | spin_unlock(&nfs_client_lock); | |
1206 | ||
1207 | server->mount_time = jiffies; | |
1208 | ||
1209 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1210 | return server; | |
1211 | ||
1212 | out_free_server: | |
1213 | nfs_free_server(server); | |
1214 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1215 | return ERR_PTR(error); | |
1216 | } | |
6aaca566 DH |
1217 | |
1218 | #ifdef CONFIG_PROC_FS | |
1219 | static struct proc_dir_entry *proc_fs_nfs; | |
1220 | ||
1221 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1222 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1223 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1224 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1225 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1226 | ||
1227 | static struct seq_operations nfs_server_list_ops = { | |
1228 | .start = nfs_server_list_start, | |
1229 | .next = nfs_server_list_next, | |
1230 | .stop = nfs_server_list_stop, | |
1231 | .show = nfs_server_list_show, | |
1232 | }; | |
1233 | ||
00977a59 | 1234 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1235 | .open = nfs_server_list_open, |
1236 | .read = seq_read, | |
1237 | .llseek = seq_lseek, | |
1238 | .release = seq_release, | |
1239 | }; | |
1240 | ||
1241 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1242 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1243 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1244 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1245 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1246 | ||
1247 | static struct seq_operations nfs_volume_list_ops = { | |
1248 | .start = nfs_volume_list_start, | |
1249 | .next = nfs_volume_list_next, | |
1250 | .stop = nfs_volume_list_stop, | |
1251 | .show = nfs_volume_list_show, | |
1252 | }; | |
1253 | ||
00977a59 | 1254 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1255 | .open = nfs_volume_list_open, |
1256 | .read = seq_read, | |
1257 | .llseek = seq_lseek, | |
1258 | .release = seq_release, | |
1259 | }; | |
1260 | ||
1261 | /* | |
1262 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1263 | * we're dealing | |
1264 | */ | |
1265 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1266 | { | |
1267 | struct seq_file *m; | |
1268 | int ret; | |
1269 | ||
1270 | ret = seq_open(file, &nfs_server_list_ops); | |
1271 | if (ret < 0) | |
1272 | return ret; | |
1273 | ||
1274 | m = file->private_data; | |
1275 | m->private = PDE(inode)->data; | |
1276 | ||
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * set up the iterator to start reading from the server list and return the first item | |
1282 | */ | |
1283 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1284 | { | |
6aaca566 DH |
1285 | /* lock the list against modification */ |
1286 | spin_lock(&nfs_client_lock); | |
259902ea | 1287 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1288 | } |
1289 | ||
1290 | /* | |
1291 | * move to next server | |
1292 | */ | |
1293 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1294 | { | |
259902ea | 1295 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1296 | } |
1297 | ||
1298 | /* | |
1299 | * clean up after reading from the transports list | |
1300 | */ | |
1301 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1302 | { | |
1303 | spin_unlock(&nfs_client_lock); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * display a header line followed by a load of call lines | |
1308 | */ | |
1309 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1310 | { | |
1311 | struct nfs_client *clp; | |
1312 | ||
1313 | /* display header on line 1 */ | |
259902ea | 1314 | if (v == &nfs_client_list) { |
6aaca566 DH |
1315 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* display one transport per line on subsequent lines */ | |
1320 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1321 | ||
5d8515ca | 1322 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1323 | clp->rpc_ops->version, |
5d8515ca CL |
1324 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1325 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1326 | atomic_read(&clp->cl_count), |
1327 | clp->cl_hostname); | |
1328 | ||
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1334 | */ | |
1335 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1336 | { | |
1337 | struct seq_file *m; | |
1338 | int ret; | |
1339 | ||
1340 | ret = seq_open(file, &nfs_volume_list_ops); | |
1341 | if (ret < 0) | |
1342 | return ret; | |
1343 | ||
1344 | m = file->private_data; | |
1345 | m->private = PDE(inode)->data; | |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * set up the iterator to start reading from the volume list and return the first item | |
1352 | */ | |
1353 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1354 | { | |
6aaca566 DH |
1355 | /* lock the list against modification */ |
1356 | spin_lock(&nfs_client_lock); | |
259902ea | 1357 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1358 | } |
1359 | ||
1360 | /* | |
1361 | * move to next volume | |
1362 | */ | |
1363 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1364 | { | |
259902ea | 1365 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1366 | } |
1367 | ||
1368 | /* | |
1369 | * clean up after reading from the transports list | |
1370 | */ | |
1371 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1372 | { | |
1373 | spin_unlock(&nfs_client_lock); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * display a header line followed by a load of call lines | |
1378 | */ | |
1379 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1380 | { | |
1381 | struct nfs_server *server; | |
1382 | struct nfs_client *clp; | |
1383 | char dev[8], fsid[17]; | |
1384 | ||
1385 | /* display header on line 1 */ | |
259902ea | 1386 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1387 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1388 | return 0; | |
1389 | } | |
1390 | /* display one transport per line on subsequent lines */ | |
1391 | server = list_entry(v, struct nfs_server, master_link); | |
1392 | clp = server->nfs_client; | |
1393 | ||
1394 | snprintf(dev, 8, "%u:%u", | |
1395 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1396 | ||
1397 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1398 | (unsigned long long) server->fsid.major, |
1399 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1400 | |
5d8515ca | 1401 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1402 | clp->rpc_ops->version, |
5d8515ca CL |
1403 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1404 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1405 | dev, |
1406 | fsid); | |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * initialise the /proc/fs/nfsfs/ directory | |
1413 | */ | |
1414 | int __init nfs_fs_proc_init(void) | |
1415 | { | |
1416 | struct proc_dir_entry *p; | |
1417 | ||
1418 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1419 | if (!proc_fs_nfs) | |
1420 | goto error_0; | |
1421 | ||
1422 | proc_fs_nfs->owner = THIS_MODULE; | |
1423 | ||
1424 | /* a file of servers with which we're dealing */ | |
1425 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1426 | if (!p) | |
1427 | goto error_1; | |
1428 | ||
1429 | p->proc_fops = &nfs_server_list_fops; | |
1430 | p->owner = THIS_MODULE; | |
1431 | ||
1432 | /* a file of volumes that we have mounted */ | |
1433 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1434 | if (!p) | |
1435 | goto error_2; | |
1436 | ||
1437 | p->proc_fops = &nfs_volume_list_fops; | |
1438 | p->owner = THIS_MODULE; | |
1439 | return 0; | |
1440 | ||
1441 | error_2: | |
1442 | remove_proc_entry("servers", proc_fs_nfs); | |
1443 | error_1: | |
1444 | remove_proc_entry("nfsfs", proc_root_fs); | |
1445 | error_0: | |
1446 | return -ENOMEM; | |
1447 | } | |
1448 | ||
1449 | /* | |
1450 | * clean up the /proc/fs/nfsfs/ directory | |
1451 | */ | |
1452 | void nfs_fs_proc_exit(void) | |
1453 | { | |
1454 | remove_proc_entry("volumes", proc_fs_nfs); | |
1455 | remove_proc_entry("servers", proc_fs_nfs); | |
1456 | remove_proc_entry("nfsfs", proc_root_fs); | |
1457 | } | |
1458 | ||
1459 | #endif /* CONFIG_PROC_FS */ |